Yadav, Ramanand; Naik, Sushant S; Naidu, Pothuri Divakar (2022): Shell weights above the lysocline over the last ~40 ka measured in sediment core SSD044_GC01 from the equatorial Indian Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.948520
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Abstract:
In this data set, we present the low carbonate ion condition in the deep sea region of the central Equatorial Indian Ocean (5°N & 77°E) over the last 40ka. The marine sediment core SSD044_GC-01 was collected during the 044th Cruise of RV Sindhu (SSD044) Sadhana using a Gravity corer. The age model of the core was obtained using four accelerator mass spectrometry (AMS ) 14C dates on ~15 mg of mixed planktic foraminiferal species, viz, Globigerinoides ruber, Globigerinoides sacculifer, Neogloboquadrina dutertrei and Globorotalia menardii. The radiocarbon dates were calibrated to calendar ages using the calib 7.1 programme (Reimer et al., 2013). For the analysis of shell weights of selected planktic foraminifera, a portion of the Coarse Fraction was adequately cleaned and sonicated. The >63 μm residue was dry sieved between 300 and 355 μm size fractions. Fifty tests of G. ruber, P. obliquiloculata, and N. dutertrei were picked and weighed on a microbalance (1σ precision: ± 2 μg, n =10). Shell weights of selected planktic foraminifera (G. ruber, P. obliquiloculata, N. dutertrei) show a low carbonate ion concentration in the deep sea region of the study area.
Keyword(s):
Related to:
Yadav, Ramanand; Naik, Sushant S; Naidu, Pothuri Divakar (2022): Contrasts in calcium carbonate dissolution above the lysocline in the equatorial Indian Ocean over the last ~40 ka. Marine Geology, 444, 106717, https://doi.org/10.1016/j.margeo.2021.106717
Yadav, Ramanand; Naik, Sushant S; Naidu, Pothuri Divakar (2022): Dissolution indices above the lysocline over the last ~40 ka measured in sediment core SSD044_GC01 from the central equatorial Indian Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.948518
Yadav, Ramanand; Naik, Sushant S; Naidu, Pothuri Divakar (2022): Species abundances above the lysocline over the last ~40 ka measured in sediment core SSD044_GC01 from the equatorial Indian Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.948516
Funding:
Ministry of Earth Sciences (MOES), grant/award no. Gap-2949: Biogeochemical Process and Paleoceanographic Studies of the Eastern Indian Ocean, Geological Oceanography Division
Coverage:
Latitude: 5.000000 * Longitude: 77.000000
Date/Time Start: 2017-11-23T00:00:00 * Date/Time End: 2017-11-23T00:00:00
Minimum DEPTH, sediment/rock: 3 m * Maximum DEPTH, sediment/rock: 149 m
Event(s):
SSD044_GC-01 * Latitude: 5.000000 * Longitude: 77.000000 * Date/Time: 2017-11-23T00:00:00 * Elevation: 3160.0 m * Location: Equatorial Indian Ocean * Campaign: SSD-044 * Basis: Sindhu Sadhana * Method/Device: Gravity corer (GC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Yadav, Ramanand | Geocode | |
| 2 | AGE | Age | ka BP | Yadav, Ramanand | Age, 14C calibrated, CALIB 7.1 (Reimer et al., 2013) | Geocode |
| 3 | Neogloboquadrina dutertrei, shell, weight | N. dutertrei shell W | µg | Yadav, Ramanand | Microbalance | |
| 4 | Pulleniatina obliquiloculata, shell, weight | P. obliquiloculata shell W | µg | Yadav, Ramanand | Microbalance | |
| 5 | Globigerinoides ruber albus, shell, weight | G. ruber albus shell W | µg | Yadav, Ramanand | Microbalance |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
222 data points